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Mechiel Lukkien
90fe36b568
with a per-account setting to disable imap extensions (capabilities) for sessions of that account. prompted by microsoft office 365, which enables the "UIDONLY" extension (indicating it limits itself to UID-using commands and promising to refrain from using commands based on message sequence numbers (MSN)), but then attempts to execute an old fashioned MSN-based "FETCH" command. users can change the disabled capabilities for their account themselves, requiring no admin intervention to work around the problems, and without affecting any other accounts/users of the system. only the account's imap connections are affected. we won't implement workarounds based on client "ID", as forbidden by its RFC. uidonly-related symptoms reported by FLuX on matrix, thanks! see issue #388 for more information.